Unit 12

2. system with several integrating and relay centers located in the forebrain
5. the heart's relaxation phase
6. fish have a _________ circulatory system
8. nervous system that includes nerves that carry impulses
9. control autonomic and homeostatic functions
11. low blood pressure
12. surface part of an animal where oxygen from the environment diffuses into cells and carbon dioxide diffuses out to the environment
17. alveoli ________ surface are
19. the trachea is always ________
20. system the communication and coordination network throughout an animal's body
21. the relay point between cells
23. potential voltage across the plasma membrane of a resting neuron
25. breathing is an alternation of ________ and exhalation
26. arm pain down a person's ___________ can be a sign of a heart attack
27. volume to test a person's _______, take a normal breath and exhale only as much air as you would normally exhale
28. blood cells the most numerous cell in blood
29. capacity to test a person's _______, take a deep a breath as possible then exhale all the air you can

1. lobe of the cerebral cortex responsible for taste and speech
3. the top number of a patient's blood pressure measures this
4. valve located between the left atrium and the left ventricle
7. chemical that carries information from one neuron to another type of cell that will react
9. where the digestive and respiratory systems meet
10. control centers in the ______ regulate breathing
13. clusters of air sacs
14. branched, short and receive incoming messages from other cells or the environment
15. thin walled, usually carries blood away from the heart
16. number of chambers of a mammals heart
18. nervous system includes the brain and spinal cord
22. veins usually carry blood to the body, except the ______ vein which carries blood to the heart
23. atria where the heart's pacemaker is found
24. when the diaphragm relaxes and air is "pushed" out of the lungs due to decrease in volume and increase in pressure results in ______ pressure breathing